Trolley wheel



Aug. 4, 1925.

G. s. MOORE TROLLEY WHEEL Filed May 31, 1925 FTQ-L Giles S MoorePatented Aug. 4, 1925.

i UNITED STATES, PATENIoFFicE.

GILES s. MOORE, or INDIANAPOLIS, INDIANA, AssIGNoR- 'ro TROLLEY'stron-WHEFL COMPANY, OF INDIANAPOLIS.' INDIANA, A CORPORATION OFINDIANA. l

TROLLEY WHEEL.

f Application led May 31, 1923. Serial No. 642,570.

' T0 all 'whom t may concern:

Be it known'that I, GILns S. Moons, :1 citizen of the UnitedStates,residing at Indianapolis, in the county of Marion and State of Indiana,have invented certain new and useful Improvements inTrolley Vheels, ofwhich the following is av specification.

`My said invention relates to a trolley having a sliding contact shoefor engaging the wire during the ordinary operation while the trolley ismoving in a forward direct-ion together with the car by which it iscarried. Such a sliding contact shoe has been found to have many.advantages over the ordinary trolley wheels. Some of these advantagesare that the damage to the wire due to arcing is lessened as arcingtakes place to much .lessextent with a shoe than with a wheel, lesscurrent is lost due to such arcing, the shoe needs no greasing, theparts need not be renewed as often as in the case 'of wheels, there isamore steady flow of current tofthe car and less resistance to over comebetween the wire and the car, less current is waster in winter-due tofrost and sleetand less damage is done -to the wire. Since it is notnecessary to oil the shoe the danger incident to walking over the roofof the car for this purpose in cold weather is done away with, as wellas .the fdamage done to the car roofs by walking on them.

There is less vibration, the lights are moreV steady and the car ridesmore evenly and with greater comfort to passengers. There is also lessexpense of wear and maintenance in various respects and owing to variouscircumstances such as that the shoe does not collect copper 'from thewire, does not wear ears in overhead construction and does notcrystallize the wire in spots as a wheel does thereby causing the wireto break. Many other advantages could be stated but the aboveY arebelieved to provide `a sulicient illustration of the importance of thisdevelopment in trolley construction.

Referring to the accompanying drawings, which are made a part hereof andon which similar reference characters indicate similar parts,

Figure 1 is a side elevation of my device partly in section, with thetrolley moving in the direction of the arrow, i. e. in a forwarddirection,

`Figure 2, a similardview showing the trolley moving in the oppositedirection, i. e. in a rearward direction, and

Figure 3, a section on line 3 -3 of Figure 1.

In the drawings reference character 10 in-` dicates a harp supported ona pole as is usual and having forks 11 which are oonnected at the upperend by a bolt 12 forming a pivot for a bracket 13j The bracket carries ashoe 14 at the end which is normally uppermost, this shoe being made ofsheet metal or other convenient material and having upstanding flanges15 at opposite sides curving outward at their upper extremities. Aremovable wear plate 16 is located on the shoe between the flanges 15and is bent downward at its front end to :cause its under surface to`correspond to Vthe upper face of the curved part 17 of the shoe. At theother end the shoe terminates abruptly and the wear plate has adepending flange or shoul-` der 18, the forward facev of which engages,

the rearend of the shoe while the rearward face. extends substantiallyin a common plane with the axis of a bolt 19 carried between forks atthe normally lowermost end of the bracket 13. Any conventional ordesirable l screw 20, the head of which is located in a counter-sunkopening in the shoe. The

shape of the contacting faces oftheshoeand'j plate insures that theholes in the two parts will register when the parts are fitted together.

VThe pivot 19. between the forks of the bracket, which bracket `is hereshown as forked at each end and integral in the middle but whichmayconsist of two separate side pieces if preIerred, provides means forrotatably sup-porting a trolley wheel 21 which is flanged as usual at 22and is so positioned relatively to the shoe that the fla-nge 18 on forksof the harp, this cross-bar being engaged in one position of the bracket1 3 by the flanges of the wheel 21 and in the other extreme position bythe under or rear face ofthe shoe 14. The cross-bar 24 may obviously bereplaced by lugs on the two forks of the harp or by a single lug or anyequivalent construction.

In the operation of the device it will be evident that the sliding shoewill contact with the trolley wire whenever the trolley is movingforward whereas when the car begins to move in reverse ydirection thebracket will tilt and cause the wheel to come in contact with the wire.At such times the bar 24 will act as a stop to limit the tiltingmovement of the bracket whereby the wheel will engage .the wire in theposition shown in Figure 2. When the rearward movement of the car isagain changed to a forward movement the resistance between the wheel andthe wire together with the action of gravity will cause the bracket totiltthereby moving the wheel toward the position shown in Figure 1, theshoe also .moving toward the position there shown.

' nThe friction Vbetween the wheel and the rear .45 the shoe.

end of the shoe on the one hand and ,the

Wire on the other hand augmentsthis ltend-v ecomes lworn another platecan readily be inserted in its place and` because of the structureillustrated andwdescribed this will be a very simple matter requiringbut little time to locate the wear plate relatively to It will also benotedl that the bar 2,4 acts as a stop to limit the movement of thebracket toward the position of Figure 1l and that it, may'eXert abraking laction on the wheel to stop its rotation at ythis time.`Thewheel is herel shown as having a plain surface but I contemplateapplying removable tread sections thereto] in some suchmanner as thatdescribed in Patent No. 1,382,664, of June 28, 1921 to Otto Moore. 1

It will be obvious to those skilled in the art that many changes may bemade in the details of construction of my device without departing fromthe spirit of the invention and` therefore I do not limit myselfto theconstruction shown in the drawat its rear end sloping abruptly towardsaid' wheel and the aXis of the wheel beingknorma-llyV directly beneathsaid rear end, substantially asset forth.

2. In a trolley, a harp, a bracket pivoted to the harp, a member on `thebracket arranged to have Vsliding contact with the wire during movementof the device in one direction, and a wheel on the bracket arranged toengage the wire on movement in the opposite direction the flattened rearend ofthe sliding Contact member lying in a plane passingapproximatelythrough the axis of sa'ic wheel, substantially as. setforth. p.

3. In a trolley, a harp, a bracket Vpivotally supported on the harp,"ashoe fixed to the bracket, a wheel pivotally supported by the bracket,and common'means on the harp for engagement by the bracketand the wheelto limit the movement of the bracket in either direction, substantiallyas Set forth.

4. In a trolley, a harp, a`bra'cketpivotally supported on the harp, a4shoe fixed to the bracket-,a wheel pivotally supported by the bracket,and a cross-bar between the forks of the harp engageable alternately theshoe and the wheel for limiting the movement of the bracket, set forth.

5. In a trolley, asliding contact shoe', a removable wear plate, meansfor securing the plate on the shoe, means for accurately positioning theplate on the shoe, similarly curved surfaces at one end of said members,a flange at the other end,of Onemember adapted to abut againstl theadjacent end of the other, and means to fasten the members in suchrelation,` substantially as set forth. l

In witness whereof, I have hereunto set my hand and seal atIndianapolis, Indiana this 29th day of May, A. D. nineteen hundred andtwenty-three.

GrILES S. MOORE.

Titnesses i E. W. BRADFORD, M. L. SHULER.

substantially as af si

